Ahh, it's too hard. Call of Duty 4, Tales of Vesperia, Metal Gear Solid 4, Final Fantasy XIII.
I agree with what the other guy said, if I could only play one game I would probably end up doing something else. But if I had to choose one, I would say Call of Duty 4, but only if I had the ability to play online with all my friends.
If it was a handheld, it would be Pokemon Heart Gold, no competition.








